A Search for Boosted Top Quarks by CDF II
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چکیده
We present the results of a search for boosted top quarks in a sample of high transverse momentum jets observed in the CDF II detector. The data were selected from a sample of 5.95 fb−1 of 1.96 TeV proton-antiproton collisions at the Fermilab Tevatron. We observe 57 candidate events in a sample where we require two massive jets or one massive jet with significant missing transverse energy, with an estimated background of 46± 8.5 (stat.)± 13.8 (syst.) events. We use these data to set an upper limit on the Standard Model t t events with at least one top quark produced with pT > 400 GeV/c of 38 fb at 95% confidence level (C.L.). We place an upper limit on the production of a pair of massive objects with masses near the top quark mass with at least one resulting jet with pT > 400 GeV/c of 20 fb at 95% C.L.
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